I think the first resource is your Sponsor or co-sponsor. If you cannot get what you need there, try contacting your upline with your request. Still no luck? Go to your A2A friends or SFI forum.
To me, the fact that you want a mentor says that you want to be the best you can be. I commend you for this!
There are a lot of people here at SFI that are very generous with their time. I would think that many would be honored to mentor you. Good luck!